That concludes our weather coverage for tonight. Updated weather information will continue from Wednesday morning.
8:30am (5/04/2017): Follow Thursday's live updates here.
11:01pm: Whanganui Civil Defence says they expect the Whanganui River to reach record highs by tomorrow.
"The latest information provided by Horizons Regional Council is that the Whanganui River is expected to rise to 19.3 metres at Pipiriki by 1:00 pm tomorrow", says District Controller, Kym Fell.
"If you are in a flood-prone area, you are urged to make preparations to re-locate early."
10:45pm: Metservice has issued severe weather warnings across the North Island, including Auckland, Waikato and Whangarei.
They warned tonight that "severe thunderstorms are moving towards the southeast", and are expected to impact Auckland, the Hauraki Gulf and Waiheke Island by 11pm.
"These thunderstorms are expected to be accompanied by very heavy rain, which may cause flash flooding and dangerous driving conditions," a Metservice spokesperson warned.
A severe thunderstorm watch also remains in force for Northland, Great Barrier Island, Coromandel Peninsula, Waikato, and Bay of Plenty.
Civil Defence warns residents to take shelter indoors, preferably away from windows, and to secure any loose objects around your property.
Drivers should be ready to slow down and stop, and beware of fallen trees and power lines.
9:40pm: Waikato Civil Defence has issued a warning.
9:30pm: All the people missing after an Auckland cliff collapse have been accounted for.
9:10pm: Civil Defence has ordered Taupo Quay premises to evacuate by 10am on Wednesday.
9:00pm: Defence force personnel have been sent to help evacuate people affected by the floods in Whanganui.
8:45pm: Newshub staff crossing Auckland's Harbour Bridge say there are "queues of traffic".
"Driving on Auckland Harbour bridge - the most treacherous I've seen in my time here," says Denise Montgomery.
"Sheeting rain and wind and speed limit is 50k."
8:35pm: Emergency services are responding to a cliff collapse on Kohimarama Road in east Auckland, with residents reportedly unaccounted for.
Ambulance and fire crews are on the scene.
8:15pm: Whanganui District schools have announced emergency closures.
"All schools in the Whanganui District and Rangitikei District will be closed on Wednesday, as a result of the state of civil emergency declared by the two District Councils. This is automatic whenever a state of civil emergency is declared," the Ministry of Education says.
"We will be advising all early childhood education services in those areas to also close. We are contacting all schools and early childhood education services in the Whanganui and Rangitikei Districts to ensure they are aware of the need to close."
8:00pm: Fire Service are dealing with multiple reports of flooding across New Zealand. The worst hit areas are Auckland's central suburbs and Howick.
7:45pm: Water levels are rising in the Whanganui River - and high tides will be a problem.
Whanganui Mayor Hamish McDouall has signed a declaration of a state of emergency for the region.
He has been advised by hydrologists from Horizons Regional Council that there could be a significant flood event from the Whanganui River on Wednesday.
From midday on Wednesday people on Anzac Parade, Taupo Quay and Pipiriki will be evacuated from their homes.
Peak levels at a water gauge at Pipiriki will be at about 17.7 metres, 2.7 metres higher than the 2015 flood.
Welfare centres are being set up, and more information will come.
Mr McDouall says the area will be particularly vulnerable from 7pm to midnight on Wednesday.
The flood may reach historic levels, he says, "but we're lucky, we have a bit of time".
"We didn't have time in 2015 but we have about 20 hours to save your precious things, maybe raise things, maybe check on your elderly neighbour."
Newshub.
